During the study of sequence stratigraphy in thenorthpart of Tarim Basin，a series ofhigh frequent progradational sequences have been discoveried in the seismic sections ofCambrian and Carboniferous.
在塔里木盆地北部的层序地层研究中，在寒武系、石炭系等许多层位的地震剖面上，发现了一系列高频前积层序。
Based on per-winter positive accumulated temperature in three regions of Huang-Huai Winter Wheat Area and Baoding of northern winter wheat area during 1997-2006,the suitable planting dates of winter wheat were preliminarily studied.
以黄淮冬麦区的邯郸、石家庄、衡水和北部冬麦区的保定1997—2006年期间的小麦冬前积温为依据,采用积温指标法对冬小麦的适宜播期进行了研究。